The heart of a father! The world wanders into many strange by-paths of affection. The love of a mother for her children is dominant, leonine, selfish, and unselfish. It is concentric. The love of a husband for his wife, or of a lover for his sweetheart, is a sweet bond of agreement and exchange trade in a lovely contest. The love of a father for his son or daughter, where it is love at all, is a broad, generous, sad, contemplative giving without thought of return, a hail and farewell to a troubled traveler whom he would do much to guard, a balanced judgment of weakness and strength, with pity for failure and pride in achievement. It is a lovely, generous, philosophic blossom which rarely asks too much, and seeks only to give wisely and plentifully. “That my boy may succeed! That my daughter may be happy!” Who has not heard and dwelt upon these twin fervors of fatherly wisdom and tenderness? As Butler drove downtown his huge, slow-moving, in some respects chaotic mind turned over as rapidly as he could all of the possibilities in connection with this unexpected, sad, and disturbing revelation. Why had Cowperwood not been satisfied with his wife? Why should he enter into his (Butler’s) home, of all places, to establish a clandestine relationship of this character? Was Aileen in any way to blame? She was not without mental resources of her own. She must have known what she was doing. She was a good Catholic, or, at least, had been raised so. All these years she had been going regularly to confession and communion. True, of late Butler had noticed that she did not care so much about going to church, would sometimes make excuses and stay at home on Sundays; but she had gone, as a rule. And now, now—his thoughts would come to the end of a blind alley, and then he would start back, as it were, mentally, to the center of things, and begin all over again. He went up the stairs to his own office slowly. He went in and sat down, and thought and thought. Ten o’clock came, and eleven. His son bothered him with an occasional matter of interest, but, finding him moody, finally abandoned him to his own speculations. It was twelve, and then one, and he was still sitting there thinking, when the presence of Cowperwood was announced. Cowperwood, on finding Butler not at home, and not encountering Aileen, had hurried up to the office of the Edward Butler Contracting Company, which was also the center of some of Butler’s street-railway interests. The floor space controlled by the company was divided into the usual official compartments, with sections for the bookkeepers, the road-managers, the treasurer, and so on. Owen Butler, and his father had small but attractively furnished offices in the rear, where they transacted all the important business of the company.